import logging
from ccdb.cmd import ConsoleUtilBase
from ccdb.cmd.Theme import Theme

log = logging.getLogger("ccdb.cmd.utils.run")

def create_util_instance():
    log.debug("      registring CurrentRun")
    return CurrentRun()

class CurrentRun(ConsoleUtilBase):
    command = "run"
    name = "CurrentRun"
    short_descr = "gets or sets current working run"
    
    def print_help(ChangeDir):
        print """ gets or sets current working run
        run (with no aguments) will display current working run
        run <run_number> will set current working run to this number
        
        """ 
    # ---- end of print_help() ----


    def process(self, args):
        log.debug("PrintWorkDir is gained a control over the process.")
	log.debug("  " + " ".join(args))
        
        assert self.context != None
                
	if len(args):
	    #set working run?
	    try:
		self.context.current_run = int(args[0])
		log.info("Working run is %i", self.context.current_run)
	    except ValueError:
		log.warning("cannot read run number")
		return 1
	else:
	    #get working run
	    print self.context.current_run
	
	# all is fine
	return 0